191011063 has 2 divisors, whose sum is σ = 191011064. Its totient is φ = 191011062.

The previous prime is 191011049. The next prime is 191011097. The reversal of 191011063 is 360110191.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 191011063 - 2⁹ = 191010551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191011033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95505531 + 95505532.

It is an arithmetic number, because the mean of its divisors is an integer number (95505532).

Almost surely, 2^191011063 is an apocalyptic number.

191011063 is a deficient number, since it is larger than the sum of its proper divisors (1).

191011063 is an equidigital number, since it uses as much as digits as its factorization.

191011063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 191011063 is about 13820.6752005826. The cubic root of 191011063 is about 575.9076407582.

It can be divided in two parts, 19101 and 1063, that added together give a square (20164 = 142²).

The spelling of 191011063 in words is "one hundred ninety-one million, eleven thousand, sixty-three".